The Liter Hydratation Bladder is a hydration system from the brand Nathan, very practical for your running or trail training sessions. Equipped with a wide opening, the Liter Hydratation Bladder offers great ease of cleaning and filling. The hose of this hydration system attaches by clipping to the bottom of the bladder, while its omnidirectional valve prevents leaks, allowing for a controlled sip, even during effort. Finally, the Liter Hydration Bladder, with its exclusive contoured design, prevents water sloshing during your intensive activities.